#include <string.h>
 
int memcmp(const void* aptr, const void* bptr, size_t size) {
	const unsigned char* a = (const unsigned char*) aptr;
	const unsigned char* b = (const unsigned char*) bptr;

	for (size_t i = 0; i < size; i++) {
		if (a[i] < b[i]) {
			return -1;
		} else if (b[i] < a[i]) {
			return 1;
		}
	}

	return 0;
}
